PC(Win XP) with Windows Media Player 11 - Shared Media - (Wired)
Sony Play Station 3 (Wireless)
McAfee Personal Firewall 10.15
Problem, I set up the Media Player...Shared the Media, but the Play Station 3 could not see the media server,
I researched as anyone would....and added the ports in the firewall as recommended and required...still no go,
I deactivated McAfee Firewall.....everything worked fine, I reactivated the Firewall.....everything stopped.
I tried various other settings....nothing worked....
I had an idea....(grasping at straws)
under the firewall settings, Networks, there was an entry for Trusted IP's in the range of 192.168.0.0 to 192.168.0.255
I left that alone....and added another....
192.168.0.104 (the IP of my Sony Play Station 3)
I have no explanation WHY this worked....as logic would dictate otherwise.
Not saying that this is the "ultimate solution for all"....but it helped me, and may help some of you.
I have seen similar issues with Xbox as well....hopefully....it will work on some of them too.
Hope it works for you.